Response to Nutrient Addition and Warming

Because productivity in most arctic ecosystems is constrained by low nutrient availability, the most common responses to nutrient addition are increases in nutrient uptake and plant nutrient mass followed by increased plant production and biomass. Similar effects on growth can be expected in response to warming through direct responses of increased productivity in a wanner environment and through enhanced nutrient uptake as a result of increased nutrient supply rate, as mineralization is likely to increase in the warmed soils (Nadelhoffer et al, 1992). 

The response to fertilizer addition, indeed, shows a generally strong sensitivity of arctic tundra to any change that leads to in- 

After combined warming and fertOizer addition the biomass and vegetation N and P mass increased additively or synergistically at 

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